Modelling the horizontal structure of mid-latitude E(s) from its refraction effects on F-region echoes

Details Modelling the horizontal structure of mid-latitude E(s) from its refraction effects on F-region echoes Modelling the horizontal structure of mid-latitude E(s) from its refraction effects on F-region echoes

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jatp...53..105b&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 53, Jan.-Feb. 1991, p. 105-114. Research supported by Aust

Physics

2

F Region, Ionospheric Ion Density, Ionospheric Propagation, Radar Echoes, Wind Shear, Atmospheric Refraction, Doppler Effect, Radar Measurement, Temperate Regions

Scientific paper

The observation of the refraction of F-region echoes presently reported implies that significant horizontal structure exists within some E(s) clouds. A modeling of the data collected with the Bribie Island HF radar indicates that wind shear variations can account for examples in which irregularities either pass through, or pass with, existing layers of E(s) which create the cloudy, nonblanketing variety of E(s). The blanketing variety of E(s) seems to have little or no horizontal structure, and most likely drifts with the same velocity as the irregularities which produce nonblanketing E(s). Irregularities with strong horizontal gradients act as diverging lenses, leading to an overestimation of cloud size via simple occulting geometry.

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